MXPA02005163A

MXPA02005163A - Differential signal electrical connectors.

Info

Publication number: MXPA02005163A
Application number: MXPA02005163A
Authority: MX
Inventors: W Gailus Mark
Original assignee: Teradyne Inc
Priority date: 1999-11-24
Filing date: 1999-11-24
Publication date: 2003-01-28
Also published as: JP2003515896A; EP1427061B1; CN1278455C; EP1232540B1; CN1258836C; KR100639560B1; CN1534833A; AU1921000A; KR20040053391A; KR20020058039A; KR100658464B1; CA2392322C; EP1427061A3; EP1427061A2; EP1232540A1; CA2392322A1; JP4643879B2; DE69943384D1; DE69941605D1; WO2001039332A1

Abstract

An electrical connector for transferring a plurality of differential signals between electrical components (14, 16). The connector is made of modules (18) that have a plurality of pairs (104) of signal conductors (102) with a first signal path and a second signal path. Each signal path has a pair of contact sections (116) extending between the contact portions. For each pair of signal conductors, a first distance between the interim sections is less than a second distance between the pair of signal conductors and any other pair of signal conductors of the plurality. Embodiments are shown that increase routability.

Description

DIFFERENTIAL SIGNAL ELECTRICAL CONNECTORS CROSS REFERENCE WITH RELATED REQUESTS This is the Request for continuation in part of E.U. Serial number 08 / 797,537, filed on February 7, 1997, with the title High Speed, High Density Electrical Connector.

BACKGROUND OF THE INVENTION The invention relates to electrical connectors, in particular with modular electrical connectors that offer paths for differential signals between main cards and secondary cards or other electrical components. Special electrical connectors can be used to connect the different components of an electrical system. Normally these electrical connectors conduct a large number of electrical signals between a series of secondary cards to a main card. The main and secondary cards are connected at right angles. Normally, the electrical connector is modular. For example, a flat metallic guide frame has several signal paths, each of which is bent approximately at right angles into the plane of the metallic guide frame. The signal paths are mounted in a Isolated deck that also contains a flat ground plate that acts as the path to ground and as an insulator between signals. The module is also assembled with other similar modules to form a connector capable of conducting a large number of signals between the components of an electrical system. Normally, the connectors are mounted on a printed circuit board, for example, a main card, a secondary card or a back plate. The conductor lines of the printed circuit board connect to the signal pins of the connectors, so that the signal can be conducted between the connectors and through the electrical system. Connectors are also used in other configurations, for example, to interconnect printed circuit boards and to connect cables to printed circuit boards. Electronic systems in general have become functionally more complex. By increasing circuits in the same space, they also operate with higher frequencies. The systems handle more data and require electrical connectors with electrical capacity to conduct these electrical signals. By increasing the frequency of the signals there is a greater possibility that the connector generates electrical noise in Reflections, crosstalk and electromagnetic radiation. Therefore, electrical connectors are designed to control crosstalk between different signal paths and to control the characteristic impedance of each signal path. To reduce the signal reflections in a typical module, the characteristic impedance of a signal path is generally determined by the distance between the signal conductors of this path and associated ground conductors and also by the two transverse dimensions of the signal conductor and the effective dielectric constant of the insulating materials located between these signal and ground conductors. The crosstalk between different signal paths can be controlled by arranging the signal paths in such a way that they are separated from each other and closer to a shield plate, which is generally the ground plate. Thus, the different signal paths tend more to electromagnetically couple with the ground conductor path and less with each other. For a given level of crosstalk, the signal paths can be placed closer when sufficient electromagnetic coupling is maintained with the ground conductors. A previous use of the shielding is shown in the description of the Japanese patent 49-6543 of Fujitsu, Ltd., dated February 15, 1974. U.S. Patents 4,632,476 and 4,806,107 (both assigned to AT &T Bell Laboratories) show connector designs in which shields are used between columns of signal contacts. These patents describe connectors in which the shields run parallel to the signal contacts through both the secondary card and the connectors on the backplane. The Patents of the United States. 5, 429,520, 5,429,521, 5,433,617 and 5,433,618 (all assigned to Framatome Connectors International) show a similar arrangement. Another modular connector system is shown in U.S. Patents 5,066,236 and 5,496,183 (both assigned to AMP, Inc.), which describe electrical modules having a single column of signal contacts and signal paths arranged in a single plane that runs in parallel to the ground plate. In contrast, U.S. Patent 5,795,191, which is incorporated herein by reference, discloses an electrical module having electrical signal paths arranged in two parallel planes each engaging a different ground plate. It seems that the preceding electrical connectors are designed primarily for single-ended signals. A single-end signal is conducted by a single signal conducting path, in which the signal is the voltage relative to a common group of reference ground conductors. For this reason, single-ended signal paths are very sensitive to any common noise present in common reference conductors. We have recognized that this presents an important limitation in the use of single-ended signals in systems that have increasing amounts of signal paths of higher frequency. Moreover, the high frequency and high density connectors that exist, often require patterns and sizes of perforations in the attached printed wiring boards (PWB), in such a way as to limit the width and number of paths of printed circuit signal that can be accommodated in the part corresponding to the footprint of the connector of the PWB. We have found that, especially on a printed circuit backplate, it is very desirable to have the ability to conduct in each signal layer several strokes in different directions between two patterns, rows or columns of particular perforations of the connector footprint. We have also found that in applications of high frequency backplate, especially if they have very long paths, the ability to place wider strokes serves to reduce the losses of the driver.

We have also detected that greater control of crosstalk can be obtained when designing differential signal connectors. Differential signals are signals represented by a pair of conductive paths, called "differential pair". The voltage difference between the conductor paths represents the signal. Differential pairs are well known in applications such as telephone cable and some high-speed printed circuit boards. In general, the two conductor paths of a differential pair are placed close to each other. If any other source of electrical noise is electromagnetically coupled with the differential pair, the effect on each conductor path that composes the torque should be similar. Because the signal in the differential pair is treated as the difference between the voltages of the two conductor paths, the common noise voltage that couples to both conductive paths of the differential pair does not affect the signal. This results in a differential pair less sensitive to crosstalk noise, especially when compared to a single-ended signal path. We have invented a very suitable electric connector to transport differential pairs. In addition, it is beneficial to have symmetrical and balanced electrical characteristics for the two paths drivers of a differential pair. Since the current connectors have signal paths of different lengths (as shown in Figures 2 and 3), the electrical delay of each path is different, which can degrade the quality of the differential signal by introducing a distortion. It would be very desirable to have a differential connector with balanced paths. Moreover, it would be desirable to have a differential connector module compatible with the components of the existing modular connectors. It would also be desirable to have a connector with a pattern of perforations in the circuit board that supports multiple wide signal paths and with better routing capability.

SUMMARY OF THE INVENTION One aspect of the invention is an electrical connector module for transferring several differential signals between electrical components. The module has various pairs of signal conductors with a first signal path and a second signal path. Each signal path has a contact part at each end of the signal path, and an intermediate section comprised between the contact portions. For each pair of signal conductors, a first distance between the intermediate sections is less than a second distance between the pair of signal conductors and any other pair of signal conductors from among the existing ones. Another aspect of the invention is an electrical connector module for conducting differential signals between electrical components, the connector module has opposite sides that end along an edge. The module contains a pair of optimized signal leads to be coupled to the differential signal. The conductors are placed in the module. Each of the conductors has a contact part separated laterally along the edge of the module. The surface portions of the pair of conductors pass from the contact portions through the module substantially in an overlap relationship along a direction extending along the sides of the module. Each embodiment of the invention may contain one or more of the following advantages. The impedance of each differential signal path is balanced. Each signal path of the pair of differential signal conductors is of equal electrical length. The pairs of differential signal paths may be closer. The separation of each pair of differential signal leads from the other pairs reduces crosstalk inside the connector. The pair of differential signal conductors can couple to the ground plate to allow other pairs of differential signal drivers to be placed closer to the signal paths without inducing crosstalk. A part of the shield plate may extend between each pair of differential signal conductors. The noise is reduced inside each pair of differential signal conductors. The routing of the signal paths is efficient. The ground contact parts may extend between the contact portions of the signal conductors and allow the signal paths to extend directly through a routing channel. The routing channel can be wide and straight.

BRIEF DESCRIPTION OF THE DRAWINGS Figure 1 is a perspective view of a system according to the invention in which a group of modular connectors are mounted between a main card and a secondary card; Figure 2 is a schematic view of a metallic guide frame of signal path of the prior art and that can be used for the assembly of a modular electrical connector in which the signal paths are uniformly separated and not arranged in differential pairs; Figure 3 is a schematic view of a frame metallic signal path guide used in the construction of a modular connector in which the signal paths are arranged in pairs of differential signal conductors in a single plane; Figure 4 is a schematic view of a metal guide frame of signal paths that is used in the construction of a modular connector in which the signal paths are arranged in pairs of differential signal wires in a single plane; Figure 5 is a perspective view of a ground plate compatible with the use of the metallic guide frame of signal paths of Figure 4, in which the contact portions of the ground plate can extend between the contact portions of the ground. metallic guide frame of signal paths; Figure 5A is a perspective view of a pin head incorporating the ground plate of Figure 5; Figure 6 is a perspective view of the signal path arrangement of the prior art, wherein the signal paths are arranged in two parallel planes and each signal path in a plane is inductively coupled with a first ground plate ( not shown) and each signal path of the other plane is coupled with a second ground plate (not shown); Figure 7 is a perspective view of another modality of signal paths arranged in pairs of differential signal conductors, wherein the signal paths are arranged in two parallel planes; Figure 8 is a front view of another additional mode of signal paths arranged as a pair of differential signal leads, wherein the signal paths are arranged in two parallel planes; Figure 9 is a side view of the signal paths of Figure 8; Figure 10 is a schematic view of a connector module with balanced electrical properties; Figure 11A is a schematic illustrating a circuit board for signal launching of the prior art; and Figure 11B is a schematic illustrating an improved circuit board for signal launching.

DESCRIPTION OF THE PREFERRED MODALITIES With reference to Figure 1, an electrical system 10 includes a modular connector 12 that connects a back plate 14 with a secondary card 16. The connector 12 includes a variety of connector modules 18 capable of driving a group of signals electrical, be these differential, non-differential or both types. For example, if mounted as described below, the electrical connector module 18 can conduct a pair of electrical differential signals between electrical components of the system 10 such as the main board 14 and the secondary board 16. Each connector module 18 has opposite sides 20 and 22 aligned in parallel. Both sides 20 and 22 terminate along an edge 24 of the connector module 18 (as shown)., the edge 24 is a flat surface section 28. However, other configurations are possible). A group of connection pins 28 extends from the edge 24. Between the modules 18, shields (not shown) can be placed. It should be noted that in a preferred embodiment, the openings 19 of each module 18 are uniformly spaced apart. In the same way, the contact tails 28 are evenly spaced. Referring to Figure 2, a metallic guide frame 50 defines eight non-differential signal paths 52a-52h to be used in the connector module 18. The guide metal frame 50 is punched from a thin flat metal element to include the carrier strips 56 that support the signal paths 52a-52h before the mounting of the electrical connector module 18 and during assembly. When the signal paths 52a-52h they are fully integrated into the electrical connector module 18, the support sections 56 are disconnected from the signal paths 52a-52h and each signal path 52a-52h is disconnected from the other signal paths 52a-52h. United States Patent Application 08 / 797,540, "High Speed, High Density Electrical Connector", filed on February 7, 1997, presents an electrical connector that incorporates the metallic guide frame 50. The application 08 / 797,540, assigned to Teradyne Inc., is here incorporated as a reference. Referring to Figure 3, a similar metallic guide frame 100, for use in module 18, defines eight signal paths 102a-102h. However, the paths 102a-102h are grouped into four pairs of differential signal conductors 104a-104d. The metallic guide frame 100 was punched out with a thin flat metal element, which supports the signal paths 102a-102h before and during the assembly of the electrical connector module 18. When the signal paths 102a-102h are completely integrated in the connector module electrical 18, the support sections 106 are disconnected from the signal paths 102a-102h, and each signal path 102a-102h is disconnected from the rest of the signal paths 102a-102h within the electrical connector module 18. Each of the paths of signal 102a-102h they include a pair of contact parts 112 and 114 and an intermediate section 116 between the contact portions. The contact parts 112 and 114 are connection pins that connect the module 18 to the electrical components of the system 10. The contact parts 112 are shown as two parallel members. These members can be bent to form a box contact as was done previously in the trade. The box contact acts as a receptacle for a pin 21 of the back plate. However, many forms are already known for separable contact regions and are not crucial to the present invention. In the present embodiment, the contact portions 112 of the signal paths 102a-102h are separated laterally and equidistantly along the edge 118 of the metallic guide frame 100. In a preferred embodiment, the separation is 0.030". As part of a system 10, the lateral separation has a vertical direction, both contact parts 112 and 114 extend from the frame 32 of the module 18. The external structure of the module 18 is identical to other modules that have not been specifically designed to drive differential signals, therefore, the modules 18 are interchangeable with other modules, and the connector 12 can be configured with different types of modules that allow the connector 18 to conduct signals both Differentials as non-differential. The intermediate sections 116 of each signal path 102a-102h are aligned in a single plane 120, usually a vertical plane. Therefore, the surface portions 118 of each intermediate section 116 of the pair of conductors 104a-104d are substantially superimposed in the vertical plane. Each signal path 102a-102h is coupled with a second signal path 102a-102h in pairs of differential signal conductors 104a-104d. For example, the signal paths 102a and 102b form the pair of differential signal conductors 104a; the signal paths 102c and 102d form the pair of differential signal conductors 104b; the signal paths 102e and 102f form the pair of differential signal conductors 104c; the signal paths 102g and 102h form the pair of differential signal conductors 104d. Each signal path 102a-102h of each pair of differential signal conductors 104a-104d is coupled with the corresponding signal path 102a-102h of pair 104a-104d. The coupling results because the distance 108 between the pairs of differential signal conductors 104a-104d is small compared to the distance 110 between adjacent pairs of differential signal conductors 104a-104d. The intermediate sections 116 of the pairs of signal conductors 104a-104d are accommodated as close as possible but maintaining the differential impedance. One of the intermediate sections 116 of each pair 104a-104d has curved sections 122, 124 which curve toward the other intermediate section 116 of the pair 104a-104d. Between the curved sections 122, 124, the pair of conductors 104a-104d remain together along most of the intermediate sections 116. The curved sections 122, 124 decrease the distance 108 between the intermediate sections 116 of each pair 104a- 104d, they increase distances 110 between adjacent pairs 104a-104d and tend to equalize the length of each of each intermediate section 116 of pair 104a-104d. This configuration improves the integrity of the signal for differential signals and reduces crosstalk between the differential pairs 104a-104d and reduces signal distortions. There are other embodiments within the scope of the invention. For example, with reference to Figure 4, a metallic guide frame 100 includes six, instead of eight signal paths 202a-202f. The signal paths are accommodated in three pairs 204a-204c. In essence, the metallic guide frame 200 is identical to the metallic guide frame 100 except that the equivalent of two signal paths 102c, 102f has been removed. The rest of the journeys have had to be aligned in pairs as before, with the separation between intermediate sections of the signal paths in a pair less than the separation between the contact parts. Two spaces 208, 210, unoccupied by the signal paths 102c, 102f, lie between the contact portions 214. Also with reference to Figure 5, a ground plate 220 contains a main body 230, with flexible connection tabs 224, and contact portions 226, 228. It is intended to use ground plate 220 instead of ground plate 23 (Figure 1), particularly in conjunction with the embodiment of Figure 4. When a connector 12 is fully assembled and coupled with the connector 13, the ground plate 222 is parallel to the signal paths 202a-202f. The contact portions 226 and 288 are aligned with the contact portions 212 of the signal paths 202a-202f. The contact portions 226 and 228 are both at right angles to the main body 230 and extend between the contact portions 212 within the corresponding spaces 208 and 210. Figure 5A shows the module of the back plate 13 'which includes the shielding member 220. It also has columns of signal pins 521. Each column has six signal pins 521, in correspondence with the six coupling contacts 212. There are no signal pins on the board connector posterior 13 'corresponding to spaces 208 and 210 (Figure 4). Instead, the contact portions 226 and 228 are inserted into the spaces corresponding to the spaces 208 and 210. As a result, there are eight contact tails in each column, six corresponding to the signal pins 521 and two which are added contact tails 226 and 228. The spacing between the contact tails is uniform, illustrated as dimension P in Figure 5A. This arrangement of contact tails means that the spacing between adjacent columns is a dimension D. The spacing D is determined by the space between signal pairs 521 in adjacent columns. In contrast, in the backplate connector 13 (Figure 1), the space between columns of contact tails for signal pins is occupied by the contact tails of a shield plate. When a back plate connector is attached to the back plate, a hole must be made for each contact tail. You can not trace routes for signal paths near the holes in the back plate. Thus, to separate the signal paths through a back plate, the traces generally run in the spaces between columns of contact tails. In the embodiment of Figure 5A, the separation D represents a Wide routing channel for signal strokes. A) Yes, the signal strokes can be made wider and thus have less loss. The strokes can also be made straighter because they do not have to bend around the ground holes of the channels between the signal contact tails. Straighter strokes result in fewer impedance discontinuities, which are undesirable because they generate reflections. This feature is particularly beneficial in a system that carries high frequency signals. Alternatively, more strokes could be routed in each layer, thus reducing the number of layers and saving costs. Referring to Figure 6, a group of signal paths 300a-300h of the prior art for use in a modular electrical connector have intermediate sections 302 aligned along two different parallel planes 320 and 322. Half of the intermediate sections they are aligned along each corresponding plane. The contact parts 314 are aligned in a third central plane. The contact parts 312 lie in separate planes and are aligned with the third central plane. Thus, when fully assembled, each intermediate section 302 lies closer to a ground plate than to any other signal path 300a-300h.

Also with reference to Figure 7, the signal paths of Figure 6 are adapted to provide a group of differential signal conductors 304a-304d. Each conductor of the pairs 304a-304d includes a pair of contact portions 332 and 334 and intermediate sections 336 and 337 that extend between the contact portions 332 and 334. Each pair of intermediate sections 336, 337 has a corresponding surface 338, 339 superimposed on the other corresponding surface 338, 339. The surfaces 338, 339 overlap one another in a direction extending through the sides 326, 328 of an electrical connection module 303 shown in Figure 6. Thus, related to the pairs 104a-104d of Figure 3, which normally have superposed surfaces 118 in the vertical direction, the pairs 304a-304d normally have superimposed surfaces 338, 339 in the horizontal direction (the comparison between the pairs 104a-104d and the pairs 304a -304d is relative and surfaces 338 can be superimposed in directions other than horizontal). However, unlike the paths 300a-300h shown in Figure 6, the intermediate section 336 of each pair 304a-304d lies closer to the corresponding intermediate section 337 of each pair 304a-304d than to a ground plate or to another for signal conductors 304a-304d. Therefore, each pair of conductors 304a-304d is coupled with the corresponding driver of the pair 304a-304d to reduce the noise. The differential pairs of signal contacts will preferably be kept in an insulating cover, which is not shown. The contacts can be placed as shown in Figure 7 and then insulating material can be molded around the intermediate sections of the contacts. To achieve proper positioning of the contact members, a plastic carrier strip can be molded around the contact members in a plane. Then, the contact members in the other plane can be superimposed on the carrier strip. And then additional insulating material can be molded over the entire sub-assembly. An alternative way to form an insulating cover around the contact members in the configuration shown in Figure 7 would be to mold the cover into two intertwining pieces. A piece would contain the signal contacts in a plane. The other piece would contain the signal contacts on the other plane.

The two pieces would be snapped together to form a module with the signal contacts placed as seen in Figure 7. This manufacturing technique is illustrated in U.S. Patent 5,795,191 (which is hereby incorporated by reference herein) . However, that The patent does not recognize the convenience of placing the intermediate sections of the signal contacts in the two parts of the sub-assembly, such that, when the two parts are assembled, the signal contacts will be superimposed to create differential pairs. Referring also to Figures 8-9, an alternate arrangement of the signal paths includes pairs of signal conductors 304 '(a pair is shown here). Like the signal paths 300a-300h of Figure 6, each conductor 304 'of the pair extends to the corresponding side 326, 328 of a module 303'. However, unlike the signal paths 300a-300h, the surfaces 318 'of the pair of signal conductors 304' are respectively flexed to obtain superposed surfaces 338 'and 339' in a direction that is perpendicular to the sides 326, 328 of module 303 '. Thus, similarly to the pairs of conductors of Figures 3, 4 and 7, the distance between conductors 304 'is smaller than the distance from the pair of conductors 304' to another pair of similar conductors. Also the contact parts 312 ', 314', like the contact parts 312 of Figure 6, lie all in a third central plane. In comparison, the contact portions 332, shown in Figure 7, and the contact portions 314, shown in Figure 6, lie in two different planes.he.

As another alternative, it is not necessary for the shield plates to be used with the differential connector modules as described above. Figure 10 shows an alternative embodiment for a differential connector module 510. As described above, a guide frame containing signal contacts is armed within a plastic molding module 511 around the intermediate portions of the guide frame. In the module of Figure 10, windows 512A, 512B, and 512C are left in the plastic above the long conductor of each pair. These windows serve to equalize the delay of the signals traveling in the guides or conductors of each pair. As is known, the speed at which a signal propagates in a conductor is proportional to the dielectric constant of the material surrounding the conductor. Because air has a different dielectric constant than plastic, leaving windows on long conductors makes the signals on these conductors move faster. As a result, the time for a signal to pass through the long conductor and the short conductor of the torque can be equalized. The length of each window 512A ... 512C depends on the differential length between the long leg and the short leg of the pair. Thus, the size of the window can be different for each pair. It is also possible that include several windows for a pair. Moreover, it is not necessary that the window be full of air. The window can be made of a material having a dielectric constant that is different from the rest of the plastic 511. For example, a plastic with low dielectric constant can be molded over portions of the long contacts in each pair of the window regions. Then, a plastic with a higher dielectric constant can be molded on top to form the plastic cover 511. Also, it is not necessary for the "window" to extend to the surface of the signal conducting contact. The "window" may be partially filled with plastic and partially with air, which would still have the effect of reducing the effective dielectric constant of the material on the long leg. A disadvantage of placing a window in the dielectric material is that it also changes the impedance of the signal contact in the region below the window. Changes in impedance along a signal conductor are often undesirable because there are signal reflections at discontinuities. To counteract this problem, other adjustments can be made to keep the impedance constant across all the signal conductors. One way to keep the impedance constant can be by changing the width of the signal conductors. In Figure 10, the drivers of signal are shown with a Ti width in a region and with a greater width T2 in the region of the windows. The exact dimensions are selected to balance the impedance based on the relative dielectric constant between the two regions. The technique of altering the width of the signal contacts in the window regions is useful regardless of why a window was formed in the connector and is not limited to only windows formed to equalize the delay. For example, some prior art connectors use windows on important portions of all signal contacts to increase the implency of all signal contacts. Figures 11A and 11B show an alternative embodiment that can be used to increase the effectiveness of a differential connector. Figure 11A illustrates a part of a back plate 600 to which a connector can be attached. In the back plate 600 perforation columns 602 are present. The contact tails of the connector would be inserted in these perforations to fix the connector to the back plate. One or more layers of ground planes 604 are included within the back plate 600. The layers of ground planes are not deposited around the perforations to avoid shorting the connections made in the perforation and exposing the areas 606 . Nevertheless, in the configuration of the prior art shown in Figure 11A, there is material from the ground plane deposited between the perforations 602. Figure 1? shows a printed circuit board of a back plate adapted to be used with a differential connector. The layer of the ground plane 604 is deposited for an exposed area around the perforations 602 forming a differential pair. In this way, there is no layer of the ground plane between the two perforations of a differential pair. As a result, the common mode coupling between the two driving elements of the differential pair is improved. It should also be appreciated that numbers and dimensions will be provided here. These numbers are only to illustrate and should not be construed as limitations of the invention. For example, connectors with 6 and 8 rows are illustrated. However, any number of rows can be easily made. It was also described that shield plates can be used. It is also possible to use landing members which have a different shape than the plate member. The landed members can be placed between pairs of conductive elements. In addition, the shields do not need to be flat. In particular, Figure 3 and Figure 4 illustrate a connector configuration in which there are spaces between the differential pair. To increase the insulation between differential pairs, you can cut tabs of the shield plates and fold them out of the plane of the plate to give greater isolation between pairs. It should also be noted that the invention is illustrated by a right angle connector and snap fit type male and female. The invention is not useful only in right-angle applications. It could be used in stacking or intermediate connectors. The invention is also not limited to plug-in connectors. It could be used with surface mounted or snap-mounted connectors. Moreover, the invention is not limited to female and male connectors. Various contact configurations are known and the invention could be used with other contact configurations.

Claims

CLAIMS; 1. An electrical connector module for conducting a pair of differential signals between electrical components, the connector module having opposite sides terminating along an edge, the module comprising: a pair of signal conductors, adapted to be coupled to the pair of signals Differentials, arranged in the module, and each of the conductors has a corresponding contact part, the contact parts of the conductors are laterally spaced along the edge of the module, the surface parts of the pair of conductors passing from the parts of contact through the module practically in an overlapping relationship along a direction extending across the sides of the module. The connector module according to claim 1, wherein the sides are parallel and the direction is perpendicular to the sides. 3. The connector module according to claim 1, wherein the signal conductors of the pair have equal lengths. 4. The connector module according to claim 1, wherein the signal leads of the pair follow. along most of the length of the pair of signal conductors. 5. The connector module according to claim 1, wherein the contact portions of the signal conductors are equidistantly spaced apart. The connector module according to claim 1, wherein at least some of the paired signal paths are connected to a group of differential signals. 7. The connector module according to claim 1, further comprising an aligned shield plate, which is adjacent to the pair of signal conductors and spaced apart therefrom, the shield plate provides a signal path with common ground. 8. The connector module according to the claim 7, further comprising an insulator member extending along a portion of the shield plate. 9. The connector module according to the claim 8, wherein the insulating member is a cover external to the shield plate and to the pair of signal conductors. 10. An electrical connector module for transferring various differential signals between electrical components, the connector module comprising: several pairs of signal conductors, each pair having a first signal path and a second signal path and each signal path having a pair of contact parts and an intermediate section extending between the contact parts; wherein for each pair of signal conductors, a first distance between the intermediate sections is less than a second distance between the pair of signal conductors and any other pair of the various signal conductors. The connector module according to claim 10, wherein the intermediate section of each first signal path is aligned in a first plane and the intermediate section of each second signal path is aligned in a second plane separated from the first plane. The connector module according to claim 10, wherein the intermediate section of each first signal path and the intermediate section of each second signal path are aligned in a plane. 13. The connector module according to the claim 10, wherein the intermediate sections of each pair of signal conductors have equal lengths. The connector module according to claim 10, wherein the intermediate sections of each pair of signal conductors are continued along most of the length of the intermediate sections. The connector module according to claim 10, wherein at least some of the coupled signal paths are connected to a group of differential signals. 16. The connector module according to claim 10, further comprising a shielding plate separated from the pairs of signal conductors, shielding plate provides a common ground signal path. The connector module according to claim 16, wherein the shield plate further comprises a main body and a tongue, the tongue extends from the main body and between at least two pairs of signal conductors. 18. The connector module according to claim 16, wherein the shield plate further comprises a main body and a ground contact portion extending from the main body. 19. The connector module according to claim 18, wherein the ground contact portion is adjacent to the contact portion of the signal paths. 20. The connector module according to claim 18, wherein the ground contact part extends between the contact parts. 21. The connector module according to claim 18, wherein the ground contact portion extends between adjacent contact portions of two signal paths. 22. The connector module according to claim 16, wherein the shielding plate further comprises a main body and a flexible tongue, the flexible tongue has the ends connected to the main body and extends from the main body. 23. The connector module according to claim 22, wherein the flexible tab has a curved shape between its ends. 24. The connector module according to claim 16, further comprising an isolation member extending along a portion of the shield plate. 25. The connector module according to the claim 24, wherein the isolation member is a cover external to the shield plate and to the various signal conductors. 26. An electrical connector module for transferring several differential signals between electrical components, the connector module consists of: several pairs of signal conductors, each pair has a first signal path and a second signal path, each signal path has a pair of contact parts and an intermediate section extending between the contact parts; wherein for each pair of signal conductors, a first distance between the intermediate sections is less than a second distance between the pair of signal conductors and any other of the various pairs of signals. signal drivers; and wherein the intermediate section of each first signal path and the intermediate section of each second signal path of the pair are aligned in a single plane. 27. An electrical connector system for transferring several differential signals between electrical components, the connector system consists of: a connector module having: several pairs of signal conductors, each pair having a first signal path and a second signal path, each signal path have a pair of contact parts; wherein for each pair of signal conductors, a first distance between the intermediate sections is less than a second distance between the pair of signal conductors and any other pair of the various existing signal conductors; a shielding plate spaced a certain distance from the pairs of signal conductors, the plate forms a common ground signal path; an insulation member extending along a part of the shield plate, - a printed circuit board having: several electrical contacts arranged in a row, a first part of the electrical contacts provides a signal contact, a second part of the electrical contacts that provide a ground contact, the first part of the electrical contacts is attached to the contact parts, the second part of the electrical contacts is attached to the shield plate; an electrical signal routing channel is adjacent to and extending along the row,, the routing channel includes several signal strokes, each signal stroke of the various ones is connected to the corresponding signal conductor. The connector system according to claim 27, wherein the intermediate section of each first signal path is aligned in a first plane and the intermediate section of each second signal path is aligned in a second plane separated from the first plane. 29. The connector module according to claim 27, wherein the intermediate section of each first signal path and the intermediate section of each second signal path are aligned in a plane. 30. The connector system according to claim 27, wherein the signal strokes extend in a straight line along the row. 31. The connector system according to claim 27, further comprising several connector modules. 32. The connector system according to claim 31, wherein each connector module of the several existing ones is placed directly adjacent to another connector module of the several existing ones. 33. A mounting of electrical connectors that has an insulation cover and mounted thereon are several electrical connector modules and between them there are electrically conductive shielding plates, the assembly consists of: a connector module with several signal paths, each signal path includes a pair of contact parts and an intermediate part interleaved, the connector modules have an electrically conductive shield plate mounted thereon, each connector module includes first and second signal paths, the intermediate portions of the first signal paths are arranged in a first plane and the intermediate portions of the second signal paths are arranged in a second plane separated from and parallel to said first vertical plane, the intermediate parts of the first signal contacts are close to a first side of the module and separated from a second opposite side thereof and the intermediate portions of the second signal paths are close to the second side and separated from the first side. the contact parts of the first journeys of signal are staggered vertically with respect to the contact parts of the second contacts; whereby, with the assembly of the connector modules and their respective shield plates interspersed in the insulation cover, each intermediate part of the first signal paths have a smaller spacing than the corresponding intermediate part of one of the second signal paths that with any other intermediate part of any of the first or second signal paths, each intermediate part of the second signal paths has a smaller separation to the corresponding intermediate part of one of the first signal paths than to any other intermediate part both of the first signal paths as seconds, thus ensuring a primary coupling between each of the corresponding first and second signal paths instead of one of the adjacent contact pairs.